Lowe said the case will eventually be presented to the Fairfield County juvenile prosecutor for possible charges.

Even though the threat was not credible, the high school is limiting hall passes and keeping students inside the building during class periods as a precaution. There will also be heightened police presence at the high school and other school buildings.

Lancaster High School Associate Principal Steve Spangler published a video message to students and parents addressing school safety on Monday:

"Verbal threats, written threats, social media — those things are taken very seriously and you guys hopefully realize that after last week," Spangler said. "None of that will be tolerated in any way and all of those will be investigated to the fullest degree ... There is never a time and there never will be a time to threaten violence, especially now. And there's no such thing as a joke. A lot of times what we hear in the office is 'I was only joking' or 'I was only kidding. I didn't mean those things I said.'"

Spangler also asked that students and parents seek credible sources, including the school, newspaper or law enforcement, for information.

"We all take school safety very seriously, and I know you hear me say that and you think it's my job to say that and it is, but also it's personal for us. My best friends work in this school. My own family goes to this school. I work here every day and this is part of my family."